Figure 1

Representative photographs of embryo stages used in this study. (A) Early cleavage, (B) Early hollow blastula, (C) 50% epiboly, (D) Dispersed blastomere phases, (E) Reaggregation phases, (F) Solid neural keel, (G) Diapause II, (H) Three-quarter overgrowth, (I) Diapause III. Scale bar is 0.5 mm. Photos are from Riggs and Podrabsky, unpublished.